(Reuters) - A revamped "American Idol" dominated U.S. television on its first outing but lost millions of viewers despite the addition of celebrity judges Jennifer Lopez and Steven Tyler.Some 26.1 million Americans tuned in for the 10th season premiere of the singing contest, down 13 percent on last year's opening show when nearly 30 million watched, according to Nielsen ratings data on Thursday.
The numbers still crushed all other programing on Wednesday night. But after weeks of hype and curiosity over what producers called "a new era," the numbers boded ill for hopes of restoring sparkle to the aging show and reversing a four years ratings slide.
Television critics were mostly unimpressed with their first glimpse of Lopez and Aerosmith front man Tyler as they weeded out good singers from the thousands of early auditions -- without the caustic presence of British judge Simon Cowell.
Cowell, the contest's biggest star, quit in May to launch his own talent show on Fox later in 2011.
Read More: American Idol" loses viewers despite make-over
